Today the PAPA system was "taken over" by people trying to locate a science balloon experiment that they believed landed inside the inner loop of the Chuckwalla Raceway race track. It had a beacon on it that they were using to triangulate its location. This was their 6th launch. They launched from Lake Forest. It got my attention so I asked about it and the net controller told me to check out scienceheads.org. See below for two neat videos - in the second one you can use your mouse to change your vantage point (look up at the balloon or the parachute after balloon pops, look down a the earth, etc). Pretty neat!

http://scienceheads.org/call-for-hab4-student-experiments/